New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates

Autores
Ivanov, Valentin D.; Cioni, Maria Rosa L.; Bekki, Kenji; de Grijs, Richard; Emerson, Jim; Gibson, Brad K.; Kamath, Devika; van Loon, Jacco Th.; Piatti, Andres Eduardo; For, Bi Qing
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context. Quasi–stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide–field, high angular resolution surveys spanning the entire area of nearby galaxies are needed to obtain a complete census of such quasars. Aims. We embarked on a program to expand the quasar reference system behind the Large and the Small Magellanic Clouds, the Magellanic Bridge, and the Magellanic Stream, connecting the Clouds with the Milky Way. Methods. Hundreds of quasar candidates were selected based on their near–infrared colors and variability properties from the ongoing public ESO VISTA Magellanic Clouds survey. A subset of 49 objects was followed up with optical spectroscopy. Results. We confirmed the quasar nature of 37 objects (34 new identifications), four are low redshift objects, three are probably stars, and the remaining three lack prominent spectral features for a secure classification; bona fide quasars, judging from their broad absorption lines are located, as follows: 10 behind the LMC, 13 behind the SMC, and 14 behind the Bridge. The quasars span a redshift range from z∼0.5 to z∼4.1. Conclusions. Upon completion the VMC survey is expected to yield a total of ∼ 1500 quasars with Y<19.32 mag, J<19.09 mag, and Ks<18.04 mag.
Fil: Ivanov, Valentin D.. Observatorio Europeo del Sur; Chile. Observatorio Europeo del Sur; Alemania
Fil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino Unido
Fil: Bekki, Kenji. University of Western Australia; Australia
Fil: de Grijs, Richard. Peking University; China. International Space Science Institute; China
Fil: Emerson, Jim. University of London; Reino Unido
Fil: Gibson, Brad K.. University of Hull; Reino Unido
Fil: Kamath, Devika. Katholikie Universiteit Leuven; Bélgica
Fil: van Loon, Jacco Th.. Keele University; Reino Unido
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: For, Bi Qing. University of Western Australia; Australia
Materia
SURVEYS
INFRARED: GALAXIES
QUASARS:GENERAL
MAGELLANIC CLOUDS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/155416
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/155416
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidatesIvanov, Valentin D.Cioni, Maria Rosa L.Bekki, Kenjide Grijs, RichardEmerson, JimGibson, Brad K.Kamath, Devikavan Loon, Jacco Th.Piatti, Andres EduardoFor, Bi QingSURVEYSINFRARED: GALAXIESQUASARS:GENERALMAGELLANIC CLOUDShttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1Context. Quasi–stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide–field, high angular resolution surveys spanning the entire area of nearby galaxies are needed to obtain a complete census of such quasars. Aims. We embarked on a program to expand the quasar reference system behind the Large and the Small Magellanic Clouds, the Magellanic Bridge, and the Magellanic Stream, connecting the Clouds with the Milky Way. Methods. Hundreds of quasar candidates were selected based on their near–infrared colors and variability properties from the ongoing public ESO VISTA Magellanic Clouds survey. A subset of 49 objects was followed up with optical spectroscopy. Results. We confirmed the quasar nature of 37 objects (34 new identifications), four are low redshift objects, three are probably stars, and the remaining three lack prominent spectral features for a secure classification; bona fide quasars, judging from their broad absorption lines are located, as follows: 10 behind the LMC, 13 behind the SMC, and 14 behind the Bridge. The quasars span a redshift range from z∼0.5 to z∼4.1. Conclusions. Upon completion the VMC survey is expected to yield a total of ∼ 1500 quasars with Y<19.32 mag, J<19.09 mag, and Ks<18.04 mag.Fil: Ivanov, Valentin D.. Observatorio Europeo del Sur; Chile. Observatorio Europeo del Sur; AlemaniaFil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino UnidoFil: Bekki, Kenji. University of Western Australia; AustraliaFil: de Grijs, Richard. Peking University; China. International Space Science Institute; ChinaFil: Emerson, Jim. University of London; Reino UnidoFil: Gibson, Brad K.. University of Hull; Reino UnidoFil: Kamath, Devika. Katholikie Universiteit Leuven; BélgicaFil: van Loon, Jacco Th.. Keele University; Reino UnidoFil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; ArgentinaFil: For, Bi Qing. University of Western Australia; AustraliaEDP Sciences2016-03-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/155416Ivanov, Valentin D.; Cioni, Maria Rosa L.; Bekki, Kenji; de Grijs, Richard; Emerson, Jim; et al.; New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates; EDP Sciences; Astronomy and Astrophysics; 588; 23-3-2016; 1-110004-63611432-0746CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2016/04/aa27398-15/aa27398-15.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201527398info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1510.05504info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:21:44Zoai:ri.conicet.gov.ar:11336/155416instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:21:44.941CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
title New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
spellingShingle New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
Ivanov, Valentin D.
SURVEYS
INFRARED: GALAXIES
QUASARS:GENERAL
MAGELLANIC CLOUDS
title_short New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
title_full New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
title_fullStr New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
title_full_unstemmed New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
title_sort New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates
dc.creator.none.fl_str_mv Ivanov, Valentin D.
Cioni, Maria Rosa L.
Bekki, Kenji
de Grijs, Richard
Emerson, Jim
Gibson, Brad K.
Kamath, Devika
van Loon, Jacco Th.
Piatti, Andres Eduardo
For, Bi Qing
author Ivanov, Valentin D.
author_facet Ivanov, Valentin D.
Cioni, Maria Rosa L.
Bekki, Kenji
de Grijs, Richard
Emerson, Jim
Gibson, Brad K.
Kamath, Devika
van Loon, Jacco Th.
Piatti, Andres Eduardo
For, Bi Qing
author_role author
author2 Cioni, Maria Rosa L.
Bekki, Kenji
de Grijs, Richard
Emerson, Jim
Gibson, Brad K.
Kamath, Devika
van Loon, Jacco Th.
Piatti, Andres Eduardo
For, Bi Qing
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv SURVEYS
INFRARED: GALAXIES
QUASARS:GENERAL
MAGELLANIC CLOUDS
topic SURVEYS
INFRARED: GALAXIES
QUASARS:GENERAL
MAGELLANIC CLOUDS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context. Quasi–stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide–field, high angular resolution surveys spanning the entire area of nearby galaxies are needed to obtain a complete census of such quasars. Aims. We embarked on a program to expand the quasar reference system behind the Large and the Small Magellanic Clouds, the Magellanic Bridge, and the Magellanic Stream, connecting the Clouds with the Milky Way. Methods. Hundreds of quasar candidates were selected based on their near–infrared colors and variability properties from the ongoing public ESO VISTA Magellanic Clouds survey. A subset of 49 objects was followed up with optical spectroscopy. Results. We confirmed the quasar nature of 37 objects (34 new identifications), four are low redshift objects, three are probably stars, and the remaining three lack prominent spectral features for a secure classification; bona fide quasars, judging from their broad absorption lines are located, as follows: 10 behind the LMC, 13 behind the SMC, and 14 behind the Bridge. The quasars span a redshift range from z∼0.5 to z∼4.1. Conclusions. Upon completion the VMC survey is expected to yield a total of ∼ 1500 quasars with Y<19.32 mag, J<19.09 mag, and Ks<18.04 mag.
Fil: Ivanov, Valentin D.. Observatorio Europeo del Sur; Chile. Observatorio Europeo del Sur; Alemania
Fil: Cioni, Maria Rosa L.. Universitat Potsdam; Alemania. University of Hertfordshire; Reino Unido
Fil: Bekki, Kenji. University of Western Australia; Australia
Fil: de Grijs, Richard. Peking University; China. International Space Science Institute; China
Fil: Emerson, Jim. University of London; Reino Unido
Fil: Gibson, Brad K.. University of Hull; Reino Unido
Fil: Kamath, Devika. Katholikie Universiteit Leuven; Bélgica
Fil: van Loon, Jacco Th.. Keele University; Reino Unido
Fil: Piatti, Andres Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina
Fil: For, Bi Qing. University of Western Australia; Australia
description Context. Quasi–stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide–field, high angular resolution surveys spanning the entire area of nearby galaxies are needed to obtain a complete census of such quasars. Aims. We embarked on a program to expand the quasar reference system behind the Large and the Small Magellanic Clouds, the Magellanic Bridge, and the Magellanic Stream, connecting the Clouds with the Milky Way. Methods. Hundreds of quasar candidates were selected based on their near–infrared colors and variability properties from the ongoing public ESO VISTA Magellanic Clouds survey. A subset of 49 objects was followed up with optical spectroscopy. Results. We confirmed the quasar nature of 37 objects (34 new identifications), four are low redshift objects, three are probably stars, and the remaining three lack prominent spectral features for a secure classification; bona fide quasars, judging from their broad absorption lines are located, as follows: 10 behind the LMC, 13 behind the SMC, and 14 behind the Bridge. The quasars span a redshift range from z∼0.5 to z∼4.1. Conclusions. Upon completion the VMC survey is expected to yield a total of ∼ 1500 quasars with Y<19.32 mag, J<19.09 mag, and Ks<18.04 mag.
publishDate 2016
dc.date.none.fl_str_mv 2016-03-23
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/155416
Ivanov, Valentin D.; Cioni, Maria Rosa L.; Bekki, Kenji; de Grijs, Richard; Emerson, Jim; et al.; New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates; EDP Sciences; Astronomy and Astrophysics; 588; 23-3-2016; 1-11
0004-6361
1432-0746
CONICET Digital
CONICET
url http://hdl.handle.net/11336/155416
identifier_str_mv Ivanov, Valentin D.; Cioni, Maria Rosa L.; Bekki, Kenji; de Grijs, Richard; Emerson, Jim; et al.; New quasars behind the Magellanic Clouds: Spectroscopic confirmation of near-infrared selected candidates; EDP Sciences; Astronomy and Astrophysics; 588; 23-3-2016; 1-11
0004-6361
1432-0746
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2016/04/aa27398-15/aa27398-15.html
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201527398
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1510.05504
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.069144

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